Why we use it
BCG considers slate when longevity, historic precedent, and roof form justify the investment and technical coordination.
Character
Color range, thickness, texture, and exposure give slate a depth that lighter roof products rarely match.
What we look for
Slate quality, weight, fastening method, underlayment strategy, flashing metals, and roof geometry suited to the material.
Design considerations
Pitch, eave detail, gutter profile, and wall materials should support the visual weight of slate.
Installation considerations
Structure, flashing, underlayment, starter courses, penetrations, and trained installers are non-negotiable.
Common mistakes
Using slate without structural review, underestimating flashing complexity, or mixing roof details from lighter materials.
Maintenance + aging
Individual slates can be replaced. Regular roof and flashing inspections protect the system.
